From what I've seen of 'spirituality' on this board, it seems to be whatever the person feels is right. While a person may claim to be spiritual, and not religious, if religion is a form of belief, then much spirituality seems to be religion with a member of one. Whatever the worshipper feels like. I have seen spiritual people claim the bible is uneeded, others claim it is needed, some that take the flood literally, some that don't, some that accept evolution, some that believe creation, some that emphasize the law much more, some that only accept teachings that coincide with what they think should be, some claim to hear voices and see visions, some claim that bible books can only be fully understood when used in conjunction with physics and eastern writings--it's all quite dodgy in the end. Everything goes---it's all true---but each person has their own special truth.
So I'd say spirituality is all emotion, and constitutes a religion with one member, or a few who like what a person says, and picks up on it.
Religion is more established and organized with more members----and is much less mercurial than spirituality.
But then, I don't really know what spirituality is. It seems that people that claim to be spiritual also have their own special definition for what that means, just as they do for how they view god. So I am only basing my observation on those that claim to be spiritual and not religious. I'm pretty sure a 'religious' person (someone following an established religion) would define spirituality differently. Perhaps an internalization of the thing they learn from their church, and something that goes beyond simply doing external things.